Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

Chapter 1
Introduction to Data Replication Manager
This chapter introduces Data Replication Manager and describes the required hardware
and software components.
This chapter contains the following topics:
■ “Data Replication Manager Overview” on page 1–1
❏ “Peer-to-Peer Remote Copy Function” on page 1–2
❏ “Hardware Redundancy” on page 1–2
❏ “Hardware Components” on page 1–2
❏ “Final Assembly” on page 1–8
❏ “Software Components” on page 1–9
■ “Required Hardware and Software” on page 1–10
Data Replication Manager Overview
Data Replication Manager (DRM) provides a disaster-tolerant solution through the use of
hardware redundancy and data replication across multiple sites separated by some
distance.
A Data Replication Manager configuration consists of multiple sites. The initiator site is
where primary data processing occurs. The target site is used for data replication. Since
data processing occurs at the initiator site, the data is replicated or mirrored to the target
site. If a significant failure happens to the initiator site, then data processing can be
resumed at the target site where the data is intact.